XML 123 R111.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial Instruments - Summary of Activity in Cash Flow Hedging Reserve within Equity Related to all Derivative Instruments Classified as Cash Flow Hedges (Detail) - INR (₨)
₨ in Millions
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disclosure of detailed information about hedges [abstract]    
Balance as at the beginning of the year ₨ 7,325 ₨ 2,367
Deferred cancellation gain/ (loss), net (6) 74
Changes in fair value of effective portion of derivatives (12) 12,391
Net (gain)/loss reclassified to consolidated statement of income on occurrence of hedged transactions (7,450) (7,507)
Gain/(loss) on cash flow hedging derivatives, net (7,468) 4,958
Balance as at the end of the year (143) 7,325
Deferred tax thereon 29 (1,419)
Balance as at the end of the year, net of deferred tax ₨ (114) ₨ 5,906